The movie, directed by brothers Anthony and Joe Russo, is based on the Marvel limited comic book series Civil War. The abbreviated plot is that a Superhero Registration Act is passed by the government which is designed to have those with superpowers act under official regulation. There are those who support the act and those who do not. Ironman supports it, Captain America does not, thus leading to a major conflict between the two that has been brewing for awhile now.

While details are sketchy as to who teams up with whom, there are obvious alliances. Also, keep an eye out for the latest hero, Black Panther, who makes a brief appearance in the trailer.